| 摘要 |
If an image is shifted in increments of pixels according to scan line changing points, the printed image suffers from jaggies or boundaries at positions corresponding to the scan line changing points. The jaggies or boundaries are also produced when a 1/2 speed or a 1/3 speed obtained by varying the process speed is used. Consequently, it has been impossible to obtain high-quality output images. An image forming apparatus is offered which has a printing unit operating to print at different process speeds and a control unit for controlling the output range of output image data for each line according to the process speeds. When the process speed in use is lower than a normal process speed, a part of 1 line of image data is outputted divisionally at timings at which lines from which image is not usually outputted at this low process speed are scanned. |
